Abstract
The development of a model for frost formation and its coupling to a commercial CFD code is presented. This combination offers the possibility to predict frost formation within complex geometries and with unsteady flow. The frost formation model is based on the Lewis analogy of heat and mass transfer. The surface temperature of the freezing body is determined by fluid-structure interaction, including insulating effects of the frost and latent heat. The model is validated in two steps: the frost formation on a flat plate is modeled and compared to experimental data from the literature; then, pulsed injection of cryogenic hydrogen into humid air is modeled. Experimentally-observed frost formation on the injector's nozzle is compared to the model's predictions for different nozzles.
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